drm/amdgpu: call flush_gpu_tlb directly in gfxhub enable

Here since we are in reset and takes the reset_domain write side lock
already. We can't use the flush tlb helper which tries to take the read
side.
Signed-off-by: Yunxiang Li <Yunxiang.Li@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c

@@ -620,10 +620,8 @@ void amdgpu_gmc_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
 	int r;
 
 	if (!hub->sdma_invalidation_workaround || vmid ||
-	    !adev->mman.buffer_funcs_enabled ||
-	    !adev->ib_pool_ready || amdgpu_in_reset(adev) ||
+	    !adev->mman.buffer_funcs_enabled || !adev->ib_pool_ready ||
 	    !ring->sched.ready) {
-
 		/*
 		 * A GPU reset should flush all TLBs anyway, so no need to do
 		 * this while one is ongoing.

drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c

@@ -4415,7 +4415,9 @@ static int gfx_v11_0_gfxhub_enable(struct amdgpu_device *adev)
 		false : true;
 
 	adev->gfxhub.funcs->set_fault_enable_default(adev, value);
-	amdgpu_gmc_flush_gpu_tlb(adev, 0, AMDGPU_GFXHUB(0), 0);
+	/* TODO investigate why this and the hdp flush above is needed,
+	 * are we missing a flush somewhere else? */
+	adev->gmc.gmc_funcs->flush_gpu_tlb(adev, 0, AMDGPU_GFXHUB(0), 0);
 
 	return 0;
 }

drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c

@@ -3192,7 +3192,9 @@ static int gfx_v12_0_gfxhub_enable(struct amdgpu_device *adev)
 		false : true;
 
 	adev->gfxhub.funcs->set_fault_enable_default(adev, value);
-	amdgpu_gmc_flush_gpu_tlb(adev, 0, AMDGPU_GFXHUB(0), 0);
+	/* TODO investigate why this and the hdp flush above is needed,
+	 * are we missing a flush somewhere else? */
+	adev->gmc.gmc_funcs->flush_gpu_tlb(adev, 0, AMDGPU_GFXHUB(0), 0);
 
 	return 0;
 }